Power converter

Convert power between watts, kilowatts and horsepower. 1 mechanical horsepower is about 745.7 W, and 1 kW is about 1.341 hp.

Value

From

Result

1 hp = 0.7457 kW

Digits

Same amount, two scales

100 hp

74.57 kW

Both bars show the same amount: 100 hp on top, 74.57 kW below.

Quick challenge

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Guess the conversion before you calculate it. How many can you get in a row?

How it works

Power is converted through the watt. There are two common horsepowers: mechanical (hp, 550 ft·lbf/s ≈ 745.7 W) used in the US and UK, and metric (PS, ch, CV: 735.5 W) used in Europe. Air conditioners are often rated in BTU per hour.

All units compared

All units compared
Unit	Symbol	Value in watts
watt	W	1 W
kilowatt	kW	1,000 W
megawatt	MW	1,000,000 W
horsepower	hp	745.6998716 W
metric horsepower	PS	735.49875 W
BTU per hour	BTU/h	0.2930710702 W

Frequently asked questions

What is the difference between hp and PS?

1 hp (mechanical) is 745.7 W and 1 PS (metric horsepower) is 735.5 W, so 100 PS is about 98.6 hp.

How do I convert kW to hp?

Multiply by about 1.341. For example, 100 kW ≈ 134.1 hp.

How many kilowatts are in 1 horsepower?

1 horsepower = 0.7457 kilowatts. The other way round, 1 kilowatt = 1.34102 horsepower.

How many horsepower are in 1 kilowatt?

1 kilowatt = 1.34102 horsepower. The other way round, 1 horsepower = 0.7457 kilowatts.